Exterior sun visor for a truck



FIG. 1 is a perspective view of an exterior sun visor for a truck showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof, the opposite side view being a mirror image of that shown; and,

FIG. 7 is a reduced perspective view thereof, shown in its position of use installed on a truck cab.

The mounting brackets shown in broken lines are for illustrative purposes only and form no part of the claimed design. The broken line showing of a truck, in FIG. 7, depicts environment and is not part of the claimed design. 

The ornamental design for an exterior sun visor for a truck, as shown and described. 